Tack supplying and inserting mechanism for pulling-over machines.



A. BATES.

TAG K SUPPLYING AND INSERTING MECHANISM FOR PULLING-OVER MACHINES.

APPLICATION HLED JULYZI, 1910. RENEWED FEB. 14,1914.

1,168,463. Patented Jan. 18, 1916.

3 SHEETS-SHEET I.

TACK SUPPLYING AND INSE RTING MECHANISM FOR PULLlNG-OVER MACHINES. APPLICATION FILED JULYZI. 1910. [RENEWED FEB. 14,1914.

1,168,463. Patented JEHL'IS, 1916.

3 SHEETSSHEET .2-

I II

WT/VZSSES. Maw

. A. BATES.

TAGKSUPPLYING AND INSEBTING MECHANISM FOR PULLING-OVER MACHINES.

APPLICATION FILED JULYZT, '1910. RENEWED FEB. 14,1914. 1

3 SHEETSSHEET 3.

1,168,463. I Patented Jan. 18, 1916.

UNITED %TATE% PATENT OFFICE.

ARTHUR BATEE, 0F LEICESTER, ENGLAND, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATIERSON, NE'W JERSEY, A CORPORATION OF NEW JERSEY.

TACK SUPPLYING AND INSERTING MECHANISM FOR PULLING-OVER MACHINES.

Application filed July 27,1810, Serial No. 574,058.

To all whom it may concern Be it known that I, Ania-inn BATES, a sub ect of the King of England, residing at Leicester, Leicestershire, England, have invented certain Improvements in Tack Supplying and Inserting lvlechanism for Pulling-Over Machines, of which the following description, in connection with the. accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This inventionrelates to taclnsnpplying and :inse'ting mechanism. I

For the purposes of illustration, the invention will be shown and described in connection with a pulling-over machine of the type disclosed in United States Letters Patent No. 1,029,387, granted June 11,1912,

on application of Ronald F; Mcl?eel' y"for improvements in pulling-over machines, and while many of its features will be found of especial value when used in connection with pulling over machines of th s type, it is to be understood that the invention is not lim-- ited to use therewith but may be advantageously employed with lasting machines irrespective of their type. Many of the benefits of the invention would also be de rived from its use in the performance of other operations in connection with the man u'facture of boots and shoes than pullingover and lasting, as for example in nail drivgenerally.

In the operation of pulling-over, which generally speaking may be said to consist in adjusting the upper and lining material of a shoe about a last and securing it in position preliminary to the lasting operation, it has heretofore been customary either to em ploy separate pulling-over or like machines for welted and lllcKalywork, or if the same machine was to oeused for both of these classes of work it was necessary when changing from welt shoes to McKay shoes, or vice versa, to substitute for the taclcsupplying and inserting mechanism in use, other mechanism for performing these operations. The reascn for this has been that in McKay work it is usual to drive the tacks which secure the pulled-over upper in position flush with the upper material while 1n welted work the tacks are left progecting a short distance above the upper. This necessitates the use'of tacks of different lengths forthese Specification of Letters Patent.

Patented Jan. 18, 1916.

Renewed February 14., 1914. Serial No. 818,786.

two classes of work, and hence calls for the useof different mechanisms for supplying and inserting the two sizes of tacks.

A general object of the present invention is to provide, in a machine of the class referred to, means whereby either welted shoes or McKay shoes may be pulled'overon the I same machine and without necessitating the removal oiany or" the parts of the machine when changing from one of these classes of pulling-over instrumentalities when the machine is operating upon one class of work, and for suspending the supply of said tacks and permitting the supply of a difierent kind of tacks t0 the drivers when the machine is operating upon another class of work. comprises a plurality of sources of tacksupply, one for each kind or length of tack,

as for example short tacks and long tacks, and means i-or selecting the kind of tacks to be supplied and for controlling the delivery A preferred form of such meansof the selected tacks to the several drivers which are associated with the grippers for pulling the upper over the last. The (llfi'iCI' out kinds of tacks may conveniently be sup plied from suitably located hoppers each of which may he provided with a number of raceways corresponding with the number of tubes or conduits for delivering the tacks .to the several drivers, and the selective deviceis preferably so constructed and arranged for manipulation by the operator'as to position an obstruction in the path of movement of either one of the actuators while leaving the other actuator free to opcrate, whereby only the tacks from the-desired one of the hoppers will be supplied to the conduits leading to the drivers, in accordance with the class of work being operated upon. In order to permit such obstruction of the movement of that actuator which it is desired to render inoperative without danger of fracturing the machine parts a yielding connection may be introduced between each actuator and the member through which it is operated from the power shaft.

In connection with the change from long tacks to short tacks, or vice versa, necessitated by the operations of the machines of the above-mentioned, or similar types, on McKay and welt shoes, it is also desirable to alter the length of stroke of the driver to correspond with the length of the tack which is driven. For. example, when such adjustments of the machine are made as to supply tacks of suitable length for use in connection with McKay work where the tacks are driven flush with the work, the stroke of the driver should be longer than where the machine is adjusted to supply the length of tack proper for welted work, where the heads of the tacks are left standing a slight distance above the upper material. Another important feature of the invention accordingly consists in providing means for controlling the stroke of the driver in accordance with the length of tack supplied to the driver. Preferably the means for controlling the length of tack supplied is connected with the means for controlling the amount-of movement of the driver through the same device, whereby the operator may by a single movement effect the described adjustments inthe machine necessitated by the change from welted work to McKay work, or vice versa.

Another important feature of the invention consists in the provision of means for effecting the described adjustments of all the drivers simultaneously. In one illustrated embodiment of this feature of the invention the driver bars are provided with abutments which are adaptedto limit the stroke of the drivers by coming in contact with rotatory adjustable members which are suitably positioned in the path of the abutments and connected togetherso that they m-av be adjusted simultaneously to the same extent. The members referred to are constructed and arranged so that when moved in one direction they will be positioned to arrest the drivers at one point in their stroke, and when moved in theopposite direction they will be positioned in a different plane so as to arrest the drivers at another pointin their stroke. In another illustrated embodiment of this feature of the invention each of the abutments on the several driver barsis arranged for contact with a two-part washer or stopdevice when the. drivers.

struction, the members of the stop device for each driver are arranged to swing toward and from obstructing position, and are connected for simultaneous movements with each other, and themembers of the stop devices for all the drivers are also so connected that they may be moved into or out of obstructing position by a single movement.

Other features of the invention, including important details of construction and combinations of parts will be hereinafter more particularly described, and claimed.

In the drawings: Figure 1 represents a side elevation of a pulling-over machine embodying the present invention: Fig, 2 represents adetail View showing in plan a series of raceways for one of the tack hoppers together withthe tack separators and associated parts; Fig. 3 is a plan view of one form of the means for controlling the stroke of the drivers; Fig. -i is a side elevation, partly in Fig. at in a different position; and Fig. 6 l

is a plan view illustrating a modified form of the devices shown in Fig. 3.

In the machine selected for illustration of the invention the main frame 3 of the head is supported by a standard 2 from a pedestal or base, and carries bearings for a power shaft 5 having thereon the appropriate cams for effecting the operations of the several machine parts, and a pulley 7, which is adapted to be connected by a belt with a source of power. As fully disclosed in the patent before referred to, the machine is provided with pairs of side grippers, one of which is indicated by the numeral 9, and with toe grippers, indicated by the numeral 11, which are respectively arranged in position for engaging the edge of the upper at the sides and at the toe of the shoe, and with actuating mechanism to cause the grippers to seize the upper and pull it upwardly and then to overlay it upon the innersole, to which it is secured by the tacks. The mechanism for performing these several operations, and the devices for permitting the op erator to efiect adjustments of the upper about the last preliminary to the final securement of the upper in position thereon,

may also be the same as described in said 7 prior patent, but as they form no part of a d,- are deposited ape-n suitablera e-Ways,

upon each cycle of operations of the machine admitonetack to each tube in proper time relation to the movement of the drivers, so that the tackswill gravitate down to the point where they are in position to be driven into the work when the drivers are actuated."

The present, invention contemplates the employment of two tack-containing hoppers, Band 15, oneof which may contain tacks of one size or kind, as for example,

such as are adapted for use in McKay work, and the other may contain tacks of another size or kind, as for example, such as are adapted for use in welted work, and means are employed in connection with the hoppers whereby either kind of tacks is supplied at the will of the operator for securing the upper in the position to which it has been worked-by the several grippers. Each of the hoppers will preferably be provided with a plurality of raceways, corresponding in number with the number of main track delivery conduits, and in the present instance I have shown" two pairs of raceways 17, 17, and 19, 19, which, re-, spectively, supply two tacks for vsecuring theiupper at each side of the shoe, and a sin le raceway 21 for su l in a tack for r securing the upper at the toe of the shoe, upon each complete operation of the ma: chine. The conduits 23 for conveying tacks from the raceways of the hopper 13, and

I the conduits 25 for conveying tacks from racewaysof the hopper 15, are arranged to connect with the tmain conduits 27 and 29 leading to, points adjacent to the two pairs of side grippers, and the toe grippers, re-

spectively, so that each main tack deliver ing conduit 27 and 29 is in free communication witha tack supplying conduit 23 and 25, as illustrated in Fig. 1. i I

The tack separators for each, set of raceways leading from the tack hoppers, in the embodiment of the invention, illustrated herein, comprise the plates 31, 31, which are supported for free sliding movements at the endsof the raceways 17, 17, and 19, 19, a nd the plate 33 which is supported for like mo ements at the end of the raceway 21, said plateshaving inclined slots 35 which lead from their inner edges and terminate in enlarged tack-escape openings 37. The

plates 31 are shown as having stops 39 at their extremitles to engage spring-pressed plungers 11 carried by the raceways, the-i- Plu es u emtie hroug n lleir, springs to engage the stops and hold the plates normally in a central position, with the open-' ings leading to the slots 35 out of line with the raceways, and thereby preventing the escape of' tacks from the raceways. The separator plate 33 isshown as being directly supported from the actuator e5 by the arms 415 whichjare fastened to the actuator, and arearrange'd in the same plane withthe'plates 31, so as to engage said plates and operate them in the manner described in the aforesaid patent; The actuator 43, for each set of raceways, comprises a slide which is supported in suitable guides for reciprocating movements transversely ofthe raceways, and carries inaddit-ion to the arm eo heretofore referred to, thearms 4:7 and 49, which are respectively supported at the ends of the slide and in position to alternately engage and actuate the plates 31. Located at the rearof the actuator slide is a ba -51, which is also guided insuitable ways forreciprocating movements trans versely of-the raceways, and is 'yieldingly connected with the slide through springs 53 which hear at their inner'endsagainstsuitable shoulders or abutment-s carried bythe bar 51, and at their outer ends-against rearwardly projecting members 55 carried by the slide, suitable washers being preferably interposed between the outer ends of the springs and the members 55, as shown. The bars 51 are provided with rack-teeth 57 ,whichware respectively in engagement with pinions 59'carried at the outer ends of shafts 61, which are rotatively supported by the frame 3. The shafts 61 are conncctedat their inner ends through ball and socket joints 60,01 similar devices, with the outer ends of'shafts 63, wh ch are rotatively sup- ,1

ported in bearings carried by brackets on the frameB, the-connection betweenthe" T shafts 61 and 63 being such as'to permit rotativemovement to betransmitted from the latter to the former of these shafts without disturbing their angular relation to each other, asillustrated in'Fig. 1. A bar 6 1,

having thereon the two sets of rack-teeth 65,

65, for respective engagement with pinions b6, 66,on the shafts 63, is carried by a rod 67 whose lower end is provided with a slide 1 69, having thereon a pin 71 whichengages I-. a cam groove or way in a cam block (5, tast I on the shaft 5. This cam groove is so designed that the rod 67 and its rack bartit are caused to make one reciprocation vupon each rotation of the shaft. I

As it is desired that only one of the two series, of raceways shall be operativeto delivertacks to the drivers at one time,"

means is [JIOVlClGCl'fOl interrupting the operation of either one of the actuators, while ire the other actuator remains in operation. In

the-illustrated embodiment of the invention this. result. is accomplished; by positioning a movable stop in the path of movement of the actuator which it is desired to render inoperative. A lever 75, which is fulcrumed at 77 to a bracket carried by the frame of the machine, carries at suitable points on opposite sides of its fulcrum, the two. pro jecting stops 79 and 81, and an extension from the lever is provided with a handle82 which is arranged in convenient position for manipulation by the operator as he stands in front of the machine. As shown in Fig. 2 each separator slide carries at one end a bar 83, which may be secured to the" arm 49 byscrews, or thelike. The bars 83' extend from the slides in position to come in contact with either of the stops 79 or 81,

according to the positionoccupied by the lever. 75, and when one of the stops is interposed in the path of a bar83 the actuator to which that bar is connected will be arrested, and the separators of that particular" set of raceways willnot deliver tacks to the drivers, while the separators for the other set of raceways will be free'to operate 1n the usual manner;

stops is thus located in position for arresting one of the actuators,*movement of the bar 51 for that actuator will be permitted with, the hopper containing the tacks desired for the kind of work to be operated upon. When a change is to be made from one kind of work to another, the operator shifts the'lever 75 and removes the stop which occupies a position in the path of one of the bars 83, and interposes the other stop in the path of thebar 83 which is connected with the other actuator. The moveare arranged to respectively determine the position of thestopsrelatively to each of the bars 83. The lever 75 may also be provided with a series of socketsto be entered by a spring-pressed locking pin carried by the frame, or with any other appropriate locking means, in order to hold the lever in either of its two positions relatively to the actuators, as above'described.

In connection with the operation of controlling'the kind of tacks delivered to the drivers, it is also desirable to provide for regulating the stroke of the driversin order that, for example, the drivers may operate to drive he acks flu h th he s e a inc McKay orn-or may leavethe heads When either of the of the tacks projecting a suitable distance above the stock, as in welted work. Heretofore it has been the practice either to change the length of the drivers or to adjust an abutment washer or projection on each driver so that the lower ends of the drivers could descend varying amounts. It is desirable, however, to determine or make this alteration in the virtual length of the drivers manually, and under the present invention the required alteration of stroke is effected rapidly, andpreferably is made in all the drivers by a single operation. Conveniently, also, such change in the stroke of the drivers may be made simultaneously with the change from one kind of tacks to another.

The driver bars 85, which are supported for reciprocation by the machine, carry at their lower ends the drivers and may be arranged, as disclosed in the prior patent referred to, suitably to drive the tacks into the-upper when it is worked into position by the pulling-over devices. These driver bars are shown as being'operated by the usual spring-actuated arms 87, which are pivotally mounted on shafts carried by the ma chine frame, and controlled as to their op; eration by the usual, or any suitable devices. Referring to Figs. 1, 3, 4, and 5, the driver bars'are shown as having thereon the collars 89, which are arranged to come in contact with adjustable stop devices, herein shown as rotatable Washers 91. Each of these washers has upon its lower surface a series of recesses 94 having beveled walls, and an underlying block 97 supported by the main frame 3, has a series of bevelfaced projections 96, said parts being so constructed and arranged'that when the washer is in the po-, sition shown in Fig. 5 the projections occupy the recesses and permit the washers to rest upon the block 97, and when the washer is rotated suitably the beveled Walls of the recesses will ride upon the correspondingly inclined or beveled faces of the projections until the solid portions of the lower surface of the j washer reach a position over the tops of the ments of the lever 7 5 may conveniently be limited by suitable-devices 76 and 78, which projections so as to be supported above the block 97, as shown in Fig. 4. When the washers for the several drivers occupy the former position, the drivers are permitted to descend a greater distance than when the obvious. In order to permit simultaneous adjustment of the washers for all ofthe Cit :' washers occupy the latter position, as will be driver bars they are shown as having lugs 93 towhich are connectedthe rods 95, by universal joints, the said connections permitting the movement of the driver bars transversely of their length, which is common to machines of this type. One of the washers also has connected to a lug 93 thereon, by a universal joint, orthe like, one end of a rod 98;whose opposite, end carries a '3 Y ke QJWh-io'hdspivotally connected at 100 5.1

to the stop-carrying lever 75, whereby adjustment of the several washers to control the length of stroke of the driver bars may be effected by the same movement, of the lever that carries the desired stop in position for determining the kind of tacks which shall be supplied to the drivers. It will be understood, that when the lever 75 is operated to position one of the stops in the path of movement of the actuator that admits, for example, the tacks used in welted work to the conduits the same movement will'effect simultaneous rotation of all the washers 91 in the direction to cause them to fall to their lower position, so that when the tacks suited to McKay work are supplied by the separators remaining in operation the drivers may operate at their maximum length of stroke, and drive the tacks flush with the work; and conversely, when the lever is moved in the opposite direction, the tacks suitable, for example, to welted work will be supplied to the conduits and the washers rotated so that they will rise on the projections 96, and limit the stroke of the drivers to that necessary for driving the tacks a shorter distance, so that their heads will remain slightly elevated above the stock.

In a modified construction of the means for adjustably determining the stroke of the drivers, as shown in Fig. 6, the stop devices are in the form of two-part washers which rest upon a part of the machine frame and are carried by arms having pivotal connections 10%, with said frame. The arms carrying the two members of the washers are shown as having intermeshing segmental gears 106, whereby the members are connected for simultaneous movement about their pivots in opposite directions. Extensions 108, from an arm of one member of each of the outside washers of the group, and similarextensions 109 from each arm of the members of the intermediate washer, are shown as being connected with rods 110 by universal joints to the end that the washer members may be moved simultaneously into, or out of, position to limit the stroke of the driver bars. One of theextensions 109 is also preferably connected by a universal joint with therod 98, which may also be connected by a universal j oint with the lever 75, for simultaneous operation with the tack-supply controlling devices, as in the form shownin Fig. 3. In the embodiment being described, a movement imparted in one direction to the rod 98, by the lever 75, or any other suitable means, will cause the members 102 of the two-part washers to approach and surround the driverbars so as to act as a stop for the abutments 89 there- ,on, and limit the stroke of the drivers to that necessary to drive the tacks partway into the work. When the sa'drod 1S moved reversely the members of the washers will separate, as shown in Fig. 6, and thereby be positioned out of the path of the abutment,

so that the drivers may make their maxitheir construction and arrangement rela-l tively to the known parts of the machine in which they are shown as being embodied, it is thought that such operation will be apparent without further description.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, the combination of drivers, a pluralityof hoppers to contain different kinds of tacks, raceways from said hoppers to the several drivers, feeding means 'for controlling the supply of tacks from the raceways to the drivers, and manuallycontrollable means forsuspending the operation of said feeding means for all but one of the hoppers.

2. In a machine of the class described, the combination of drivers, a plurality of sources of tack-supply, means for conveying,

tacks therefrom to the drivers, feeding means fol-controlling the supply of tacks from each source, actuators for said feeding means, means for operating said actuators, and means for suspending the operation of all but one 'of said actuators to permit the desired kind of tacksto be supplied to the drivers.

3. In a machine of theclass described, a driver, a plurality of sources of tack-supply, means for conveying tacks therefrom to said driver, feeding means for controllingthe supply of tacks from each source, actuators for said feeding means, a source of power, connections including a yielding device .between said source of power and the actuators, and means for obstructing the movement of one of said actuators whilethe other actuator continues in operation.

4-. In a machine of the class described, a driver, a plurality of sources of tack-supply, means for conveying tacks therefrom to said driver, tack-separators for controllingthe supply of tacks from said sources, actuators therefor. a member having yielding connection with each actuator, means to effect simultaneous operation of said members, and means to obstruct at will the movement of one actuator while the other actuator is free to operate.

a raceway for each of said sources, conduits from each of the raceways to said driver,

tarlcseparators for said raceways, actuators therefor, a source of power and connections including a yielding element for operating said actuators, and a manually-controllable stop device arranged to obstruct the movement of either actuator While the other actuator is free to operate.

6. Ina machine of the class described, a driver, a plurality of hoppers for containing tacks, conduits for conveying tacks from the hoppers to said driver, a tack-feeding device associated with each hopper, an actuator for each feeding device, means for imparting movement to said actuators, and a manuallycontrollable lever supported between said hoppers and carrying stops, said lever being arranged for adjustment to position either of said stops in the path of movement of an actuator while the other actuator is free to operate.

7. In a machine of the class described, a

driver, a plurality of hoppers for containing tacks, conduits for conveying tacks from the hoppers to said driver, a tack-feeding driver, a plurality of hoppers for containing tacks, conduits for conveying tacks from the hoppers to said driver, a tack-feeding device associated with each hopper, actuators therefor, a member having yielding connection with each actuator, a device having connection with the power shaft of the machine for imparting reciprocating movements to said members, and a manually-controllable stop device arranged to obstruct the movement of either actuator while the other actuator is free to operate. I

9. A machine of the class described having, in combination, a plurality of drivers, a plurality of hoppers for containing tacks, a set of raceways in communication with each hopper, conduits for conveying tacks from said raceways to said drivers, a set of tack separators for each set of raceways, an actuator for each set of separators, means for imparting reciprocating movements to the actuators, and means for suspending the movement of one of the actuators while the other actuator is free to operate.

10. A machine of the class described having, in combination, a plurality of drivers, a plurality of hoppers for containing tacks, a set of raceways in communication with each hopper, conduits for conveying tacks from said raceways to said drivers, a set of tack separators for each set of raceways, an actuator for each set of separators, a member having yielding connection with each actuator, means including a reciprocating bar for simultaneously actuating said members, and a device under the control of the operator for arresting the movement of either actuator While the other actuator is free to operate.

11. In a machine of the class described, the combination of a driver, a pluralityof hoppers, a tack separator for each hopper, operating means therefor, and a single device for suspending the operation of either of said separators and for controlling the stroke of the driver.

12. In a machine of the class described, the combination of a driver, a plurality of hoppers, a tack separator for each hopper, operating means therefor, and means for simultaneously suspending the operation of one of said separators and controlling the stroke of the driver.

13. In a machine of the class described, the combination of a driver, a plurality of hoppers, a tack separator for each hopper, actuators therefor, means to control the stroke of the driver, and a single device arranged to obstruct the. movement of either of said actuators and to adjust said means so that the stroke of the driver will be ap-' 'propriate for the kind of tackssupplied by each hopper, means for conducting tacksfrom said raceways to said drivers, tack separators for each set of raceways, actuators therefor, and means to simultaneously suspend the operation of an actuator and adjust the driver-controlling means for the kind of tack supplied.

15. In a machine of the class described, the combination of a plurality of sources of tack-supply, tack feeders therefor, a power shaft, actuating connections between said shaft and each of said feeders including a yielding element, and means for introducing an obstruction in the connections between said shaft and any one of the feeders.

16. In a machine of the class described, the combination of a plurality of sources of tack-supply, tack feeders therefor, a power shaft, a reciprocating member having connection with said shaft, yielding connections between said member and the feeders, andmeans for introducing an obstruction in any of said connections at the will of the operator.

17. In a machine of the class described. the combination of a plurality of sources of tack-supply, tack feeders therefor, a power shaft, a rack bar arranged for reciprocation by said shaft, pinions connected with said rack bar, yielding connections between said pinions and feeders, and means for ob- 20. In a machine of the class described,

the combination with a pluralit of driver bars having abutments, of adjustable stops in the paths of said abutments, and connectionsbetween said stops to permit their simultaneous operation, said connections being also constructed and arranged to permit lateral movement of the drivers.

21. In a machine of the class described, the combination with a plurality of driver bars having abutments, of rotarily adjustable stops in the paths of said abutments, and,

rods having connection through universal joints with said stops.

22. In a machine of the class described, the combination with a driver bar having an abutment, of a rotarily adjustable stop in the path. of said abutment, and means for rotating said stop to control the stroke of the driver.

23. In a machine of the class described, the combination with a driver bar having an abutment, of a rctarily adjustable stop arranged in the path of said abutment and provided with recesses, a support for said stop having projections to enter said recesses, and means for moving sald stop to bring said recesses into or out of registration with said projections.

24. In a machine of the class described, the combination with a driver bar having an abutment, of a rotarily adjustable stop arranged in the path of said abutment and provided with flaring recesses, a support for said stop having tapering pro ections to enter said recesses, and means for moving said stop to bring said recesses into or out of registration with said projections.

25. In a machine of the class described, the combination with a plurality of sources of tack-supply, of a plurality of drivers, and means for simultaneously controlling the kind of tacks supplied and adjusting the stroke of the drivers.

26. In a machine of the class described, the combination with a plurality of sources of tack-supply, of a plurality of drivers, and a single device for determining the kind of tacks supplied and adjusting the stroke of said drivers.

27. A machine of the class described having, in combination, pulling-over devices, drivers associated with said devices, a plurality of sources of tack-supply, and one means for determining the kind of tacks supplied to the drivers and for controlling the stroke of said drivers in accordance therewith.

28. In a niulti-tack driving pulling-over machine, the combination with drivers, means for operating the drivers, and means for adjustably controlling the length of the driver strokes, of a plurality of sources of tack supply for said drivers, two tack separating and feeding mechanisms, and selective means for controlling the stroke length of the drivers and arresting the operation of one or the other of the two feeding mechanisms.

29. In a multi-tack driving pulling-over machine, the combination of a driver, two sources of tack supply, separate mechanisms for feeding single tacks from either of said sources to the driver, means for effecting variations in the stroke of the driver, and a single device for controlling the driver stroke length varying means and for rendering one of the feeding mechanisms inoperative and simultaneously rendering the other feeding mechanism operative.

30. In a multi-tack driving pulling-over machine, the combination with two hoppers and a single set of drivers, of two sets of tack separating and feeding devices, one for each hopper, and selective means to effect feeding of the tacks exclusively from either set of separating and feeding devices to the set of drivers, said means being operative for all the separating and feeding devices substantially simultaneously.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR BATES.

Witnesses ARTHUR ERNEST JERRAM, KATHERINE PEXTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C. 

